Questions relating to the dynamic family of functions in Mathematica, such as Dynamic, DynamicModule and Manipulate.

learn more… | top users | synonyms

7
votes
2answers
876 views

Moving From Dynamic Module to Manipulate

In trying to implement Vitaly's suggestion about how to take control of Locator events, I have been able to make headway using ...
7
votes
2answers
482 views

Click in a vector plot to plot several solutions of a system of differential equations

I am aware of the Locator button and I am aware of the Equation Trekker package, but they are not what I want to use. Here is what I specifically want to know how to do, if possible. Consider the ...
7
votes
2answers
444 views

How to efficiently get the value from form UI built with dynamic InputField

Here is the code that I used to make a tabular UI. ...
7
votes
3answers
280 views

Wrapping EventHandler by Table

I am making a grid on the screen. The grid is composed of different expressions. I want all of them to have a Gray background, which turns into a ...
7
votes
2answers
287 views

Moving controls from Manipulate to a Palette ( or similar GUI object )

Consider the following snippet as a reference. ...
7
votes
3answers
231 views

Panning by moving Origin (0,0) with Mouse

Given a 10 by 10 grid like the one below and the axis origin somewhere on the grid, I would like to be able to place the mouse pointer at the axes origin (0,0), then press and hold the mouse button ...
7
votes
2answers
517 views

Detecting double click events

Is there a way to detect double click events? I did not find anything on the doc page of EventHandler. Use case: I want to re-implement the ...
7
votes
3answers
103 views

Prevent Dynamic from behaving dynamically until notebook evaluated

If a notebook containing a = {1, 2}; Dynamic[a[[2]]] (* 2 *) is executed, closed, and then opened in a new session, it yields along with the expected error ...
7
votes
1answer
216 views

Asking for input in an event handler

Why won't EventHandler["text", {"MouseClicked" :> (output = Input[];)}] work? When I click "text" the kernel hangs.
7
votes
2answers
142 views

Panning with Mouse + Moving A Curve

I would like to be able to move any curve (for example f(x)=x, or g(x)=x^2) by mouse dragging the particular curve. I would like to keep the functionality I have for panning across the screen in ...
7
votes
2answers
113 views

How to make a notebook take action whenever a particular symbol is defined or redefined?

For teaching purposes, I want to create a Mathematica notebook that will "notice" when the user defines or redefines a variable or function of a particular name, so that it can check the value and ...
7
votes
1answer
404 views

Execute code when file is modified

I have a function the takes some time to complete. The function imports data from a .csv, parses it, and plots certain vectors from there. The .csv is constantly being updated from an external ...
7
votes
1answer
561 views

Want Interactive PlotRange of Graphics[{}]

I am trying to do: ...
7
votes
2answers
167 views

Making ColorSetter work like a PasteButton

I might be missing something obvious here. I am building a palette for constructing code to make certain graphics. The idea is that my colleagues can click buttons instead of having to know the right ...
7
votes
1answer
90 views

How to interactively transform an image (rotate / translate / etc) on a per-component basis?

I have binary images like this one and I want to be able to interactively select its components and rotate them around its centroid by a different angle for each component. I may also want to ...
7
votes
1answer
190 views

Momentary Checkbox

I'm trying to create a demonstration in Mathematica where a checkbox will show an answer, but I only want the answer to be shown while the mouse button is pressed. There seems to be a ...
7
votes
1answer
394 views

Poincaré map for dynamic billiard

There's a very nice demonstration of dynamic billiard written by Dan S. Reznik that can be found on demonstrations wolfram(along with the code): here I was thinking whether it would be possible to ...
7
votes
1answer
212 views

Prevent interdependence of controls

My question is probably best illustrated with this small sample code: ...
7
votes
3answers
211 views

Dynamically transform one Graphics to another

I would like to have two Graphics objects displayed side by side such that: they are mirror images of each other if I change the left-hand one interactively using ...
7
votes
1answer
168 views

How to inherit options by scoping?

Consider the following example: you have a function framed producing a cell with a button that, when pushed, calls framed again. ...
7
votes
1answer
251 views

Why is the Locator snapping back to the original coordinates? How can I prevent this?

Take the following code: p = {3, 3}; Graphics[Circle[{5, 5}, 5], Epilog -> Dynamic@Locator[Dynamic[p]], Axes -> True, GridLines -> {{3}, {3}}] ...
7
votes
1answer
464 views

How to make dynamic input fields work with drag & drop

I have an application using InputField to allow a user to dynamically update a data structure. In some cases the user will want to remove a string from one field ...
7
votes
1answer
508 views

How to create a multi-selectable setterbar with colored buttons

Background: consider the following code-snippet. ...
7
votes
1answer
211 views

How can I have interruptible computations inside a manipulate?

Here's a perfect example of my problem: Manipulate[Pause[n], {n, {1, 10}, ContinuousAction -> False}, SynchronousUpdating -> False] It is illustrated by ...
7
votes
2answers
185 views

How to track Part of Symbol or How to symbolize Parts of Symbol without copying data

Let's create simple function: SetAttributes[h, HoldFirst]; h[data_] := Dynamic[Grid[data], TrackedSymbols :> {data}] test = RandomReal[1, {2, 2}]; h[test] ...
7
votes
1answer
230 views

Can I select or implement a Manipulate bookmark from an arbitrary control?

I understand how I can select a bookmark from the "+" menu of a Manipulate. Is there a way to select a bookmark from an arbitrary control, or define a control that ...
6
votes
3answers
364 views

Simple blink comparator for two images

I tried to build a simple 'blink comparator' - where you can click on an image repeatedly to switch between two similar images. (An old-fashioned notion in the days of powerful image processing ...
6
votes
3answers
603 views

How do you properly create Buttons to change dynamic variables using Table

In this example, I want a series of four buttons to change the value of a variable that is used dynamically to drive a plot. I am trying to figure out why using Table around the buttons causes a ...
6
votes
4answers
340 views

Plot[f,{x, xmin, xmax}], where xmax is not a const

I have a graph of the function, as in the picture. Function can be set manually, but after a certain value, it is 0. Could I find this value to put it instead of xmax=1 in Plot in order to avoid ...
6
votes
2answers
967 views

Formatted text in a Dynamic or Manipulate control

I am using a Manipulate control to show different calculations for the same user-specified parameters. I would like to show the results for the calculation the ...
6
votes
2answers
584 views

A command for outputting a list of parameter values in a Manipulate interface

I am looking for a command that will output a list of values that correspond to the current parameter values manually set on a particular Manipulate interface. For ...
6
votes
2answers
408 views

Programming with Dynamic

I don't understand the following: f[a_, b_] := a + b ls = {1, 2, 3}; MapThread[f, {ls, {10, 20, 30}}] This yields ( as expected ) {11,22,33} If I change ...
6
votes
4answers
318 views

Dynamic list in which the sum of the elements is invariant under changes to the elements

2nd Update Here's a snapshot of a graphical user interface I'm thinking. I hope this could be self-explanatory and demonstrate the functionalities I mentioned in the 1st update. Thank you all! ...
6
votes
3answers
517 views

Unexpected Setter Bar Behavior when Manipulate Nested in Dynamic Module

Consider this code: DynamicModule[{x, y}, x[t_] := t^2 + 5; y[t_] := t^3 + 5; Manipulate[Plot[fcn[t], {t, -5, 5}], {fcn, {x -> "Square", y -> "Cubic"}}]] ...
6
votes
3answers
485 views

Locators in Manipulate not moving properly

I thought a simple Mathematica kerning machine (for adjusting the space between characters) would be interesting, but I'm having trouble with the locators. (There are a number of other questions ...
6
votes
2answers
576 views

How can I make a list animation of images that fade in and out?

I'm not sure how to get a "fade in" effect.
6
votes
2answers
210 views

Dynamic plot with synchronization of real time

I want to do a dynamic plot with synchronization of real time, that is, I have a function, f[t], that is a function of time (seconds), so I want to see the curve changing not so fast or not so slow, ...
6
votes
3answers
290 views

Displaying a locator that moves smoothly and updates some dynamic variables

I want to select a point on a graph and display a function of the coordinates value. Asking here a related question I learned to use Setting. Consider the example, where I display the coordinate ...
6
votes
2answers
459 views

How to get state of checkbox?

Please explain how to get state of checkbox for its usage in further calculations. And I want to keep the selection from session to session without external savings. Thanks in advance
6
votes
3answers
132 views

Can I disable specific items in a PopupMenu control?

I have a PopupMenu in a Manipulate with items in it that are inapplicable in some cases, and rather than removing them, I would ...
6
votes
2answers
198 views

Why the Mouse dragging response not as smooth as Locator

I am experimenting to use MouseDragged eventhandler to change the vertices positions of a triangle, it works, but not as smooth as using Locators. Is this the ...
6
votes
2answers
412 views

How to dynamically update Locator[] constraints?

I need to visualize Menelaus' theorem for a triangle with moving locators for each of six points. So the vertexes of the triangle can move in any possible way, and the three points on the sides of the ...
6
votes
2answers
423 views

Creating a list of PopupMenus that dynamically update an element in a list

So as the title says I am trying to make a list where each element is determined by a users choice of an element in a PopupMenu. My first attempt: ...
6
votes
2answers
291 views

Manipulators and Dynamic in more concise code

Is there a way to update dynamic variables through a function. I was looking back at one of the answers from Heike where she showed me how to make my custom ...
6
votes
2answers
336 views

A good way to manage code in a complicated CDF?

When doing complicated programming in a Mma notebook I define several functions that I use in my higher level funtions, and I use a "Subsection" cell for each definition. For example I might write: ...
6
votes
3answers
380 views

Question about modifying a Slider2D control

Background: I want to develop a custom control, based on a 2D slider. I currently have this ( working ) example. ...
6
votes
2answers
121 views

Issues with Dynamic's second-argument functions

First: According to the documentation Dynamic[expr,f] evaluates f[val,expr] during interactive changing or editing. Now check ...
6
votes
2answers
97 views

How do Dynamic Attributes work?

Reading in the doc, it is mentioned in the example of Dynamic that this way of writing the code does not work: ...
6
votes
5answers
1k views

sliding a tangent line along a curve

I am confused by Dynamic. I am trying to slide a tangent line along a curve, without using DynamicModule, so that I can include ...
6
votes
1answer
302 views

Dialog inside Dynamic Module [duplicate]

The following doesn't appear to work: DynamicModule[{}, Button["Press Me", ChoiceDialog["OK or Cancel?"]]] When I press the button labelled "Press Me", a dialog ...